Paper-making machine



March 31. 1925. 1,531,482

A. J. HAUG.

PAPER MAKING nczxiun Filed June 19. 1 22 s Sheets-Sheet 1 Inven for am ww A. J. HAUG PAPER MAKING MACHINE Filed June is. 192; a Sheets-Sheat 2 March 31, 1925. 1,531,432

Eat-Ki in van for:

March 31. 3925. 1,531,482

- I A. J. HAUG I PAPER MAKING MACHINE I Filed June 19. 1922 3 Sheets-Sheet 5 fnvenior;

- ingsuriaee:

Patented Mar. 3i, title.

iJilTEfi era.

FEM g4: his

ANTGN J. HA'UG. F NASH'UA, -NEN HAMESHIRE.

IFAIEB-MAKING MACHINE.

Application filed June 19, 1922. Serial No. 569,286.

To a whom it may concern: 7

Be it known that l, AN'roN J. Hum, a citizen of the United States, and resident of Nashua, countvot' l-l illshorough, State of New Hampshire. have invented an Improvement in Paper-Making Machines. of which the, following description, in connection with the, accompanying drawings, is a. specification, like characters on the drawings representing like parts.

This invention relates to paper-makiug machines, and more particularly to apparatus for, and process oi", rt-ing from liquid material suspended her and thickening the same to a web-tori g consist-- ency. The invention contemplates the removal of the thickened stock from the machine, either in web form or in hunches, as desired, as well as the emplovment of means to further dry out and strengthen the stock web formed by the operation of the maehinc-all as hereinafter set forth and illus trated by the accon'ipanyin; drawings.

In the drawings:

Figure 1 is a sectional, end elevation, looking toward the drive end, of a preferred form of machine embodying the invention, said sectional elevation being taken on line fir-1 of Fig. 2;

Fig. 2 is a sectional side elevation of the same machine, showing the stock inlet, trough, and screw conveyor partly in section;

Fig. 3 is an end elevation of the machine, showing the stock inlet and the outlet for the thickened stock;

Fig. 4 is a plan view of the stock inlet;

.tiusjg 5 and 6 are fragmentary details Showing the construction of the srreen drum of the same machine;

Fig. 2', 8, 9 and 10 show other means, within the scope of the invention, for re moving the thickened stock from the screen- Figsll and 12 are diagrammatic sketches, showin means for further drying and strengt ening the stock-web formed by the operation of the machine, and leading the same to the exterior thereof; in Fig. 11. an inclined shute being employed for the discharge of the stock-web, while in Fig. 12, means are shown for positively conveying the said web out of the machine;

Figs. 13 and 14. areplan views ofFigs. 11 and 12, respectivelv.

In the drawings, 1 represents a casing closed at both ends, with the exception of an inspection opening 2 (Fig. 3) through whicl the operation of the inaohine may be observed. Within said casing, a screen drum 3 is revolublv mounted, said drum being constructed with end members 4.- and 5, the former shown as a spider containinghub 6, keyed to shaft 7, and the latter as a rim, with the diameter of its inner circumference smaller than that of the screen drum, whereby to prevent the stock from spattering out of said drun'r at that end of the machine.

The outer circumferences of end. members 4 and 5 are connected by a plurality of rods or bars 8 (Figs. 5 and (3) and said rods are encircled, at regular intervals, by a number of rings 9, the latter being held mutually equidistant by pipe braces 10, which are slipped over rods 8, between the respective rings. The whole frame-work is stifi'ened and held rigid by nuts 11 on the endsof the aforesaid rods. Over said framework, wire backing 12 and. facing 13 are secured.

Shaft 7, upon which the screen drum is mounted for revolution. rests in bearings 1 and 15, supported by brackets 16 and 17, east in the respective ends of the casing. 18 indicates a pulley keyed to the said shaft and adapted to rotate the latter by means of power transmitted from any convenient source.

19 represents one of a. pair of brackets which are fastened to each end oi the rear wall of stock trough 20. Said brackets constitute a support to which arms 21 are piv otally connected, said arms being adapted to hold the journals 22 of couch roll 23 in such position that its surface closely approaches the, inner surface of the screen drum;

Arms 21 are connected. at their other e tremities, by bar 24. the arms and said com nection forming); a single, rigid member. In connectingbar 24, a hub 25 is arranged to carry threaded rod 26, which is, at one end, pivotall held in bracket 27, i'asteued to the wall of the stock trough. and at the other end, is equipped with spring 28 and handwhecl 29.

Depending; extensions of arms 21 form supporting members 31, to which 'doct0r 32 1S couch roll, the pivots being denoted et at.

pivotally. fastened at each end ofzthe,

The said doctor is held, in the manner described, so that its edge is in tangential relation to the couch roll. and thus adapted to divert the stock-web therefrom. -The pressure of the doctor edge against the couch roll surface may be adjusted by regulating weight 34, carried by lever 35.

While couch roll 28 constitutes ample means for removing the thickened stock from the screening surface, the functioning of said couch roll is preferably facilitated by the provision of pipe 36, from which a blast of air or other fluid under pressure is directed upon the outer screening surface, and adapted to assist the coaching action of the roll. Pipe 36 is inserted in hubs 37 and 38, provided in the respective upper ends of the sides of easing 1.

Stock trough forms part of inlet casting 39, said inlet-having its intake at 40 and spreading out in the interior of the screen drum, as shown in Fig. 4, to form stock reservoir 41. This reservoir is longitudinally coextensive with the screen drum, and its outer edge is dammed by weirs 42 and 43, over which the stock must flow in order to reach the surface of the screening drum. By thus backing up the stock and cbliging it to flow over dams, a steady, even distribution of said stock upon the screening surface is insured.

Within stock trough 20, a screw-conveying member 44 is shown fastened to the shaft and adapted to revolve therewith, thereby screwing the stock which falls into said trough along the same toward outlet 45,,Where it is delivered into shute 46 and discharged from the machine. This conveying member is not necessary to the ethciency of the machine, for the trough may be inclined downwardly and the thickened stock caused to travel along the same toward the outlet end of the machine hv gravity and the head of the stock behind.

At 47, is shown an outlet for the liquid or ,white water which has been drained from the stock by the operation of the machine.

In operation, papcrstock, or other mate rial suspended in liquid, is fed to the interior of the screen drum thru intake 40, where it spreads out in stock reservoir 41, and finally flows over dams 4-2 and 43, falling, by gravity, in a continuous, even stream. against the inner surface of the screen drum. along the entire length thereof.

The rapid rotation of the screen drum develops centrifugal force, in a' greater or less degree, according to its speed. and causes the stock delivered upon the inner surface of said drum to adhere thereto during the revolution of the drum. The said centrifugal force/further acts upon the stock, now adhering to the revolving screening surface, to drive the liquid in said stock thru the perforations in said surface, leaving the stock thereon in a relatively drier condition. I

The stock, by being thus subjected to the operation of centrifugal force, in the machine described, may be thickened to any desired consistency, within certain limits, depending upon the practicability of con ShIllCtlng and driving machines of this type,

beyond a certain size. The desired degree of dryness of the stock is herein obtainable by regulating the speed of the screen drum, of given diameter, and the pressure between the inner surface of said drum and the contacting surface of the couch roll. For example, if stock of great dryness is desired, a high speed of the drum in combination with increased pressure he tween the surface of the 'eouch roll and the said drum will give the desired results.

W hen, therefore, it is desired to'move the couch roll closer to the surface of the screen drum, in order to obtain this increased pressure, hand-wheel 29 is turned, spring 28 compressed, and the supporting arms 21 are caused, thru the pressure applied to their connection 24, to swivel about their pivots 30 and carry the couch roll upwardly for the desired distance.

In Fig. 7, the couch roll shown in Fig. l is replaced by bar 48, held rigidly in working proximity to the inner surface of the screen drum. Said bar may be covered with felt, or other soft, flexible material, so that it may be brought closely proximate the screening surface, for the purpose of scraping the stock therefrom. without possibility of injuring the screen ing wire. In operation, the edge of this felt-covered member is eaused to oppose the thickened stock which is being carried on the revolving screening surface, to scrape said stock from said surface, and guide it toward the trough provided below.

Fig. 8 shows a stationary pipe 4!). located outside the screen drum and adapted to supply a continuous current of air. or other fluid under pressure, to the screening surface. Said pipe is purposely placed so that it operates upon a portion of the screening surface slightly in advance of the part adjacent the edge of doctor 50, which is held rigidly proximate the inner screening wall. The edge of said doctor is not necessarily brought in such close proximity to the screening surface, as is the edge of bar 48 in Fig/7, since the liftingot' the thickened stock from the screening surface is here accomplished bv the air from pipe 49. the doctor in this figure being provided merely to further alter the path of the stock,already lifted from the screen ing surface, and cause thesame to fall into the trough below. I

It should be noted, in connection with Ill) ' tion of the machine.

memes the screening surface, without disturbing the web, which has formed by the opera- In Fig. 9, the means for removing the stock from the screening surface is further varied. A roll 51 is here shown, with its surface in working proximity to the screening surface. In this arrangement, however, the roll does not receive its power to revlove from contact with the revolvin screen drum, but is driven by means of "puley 52, provided on its journal, and

cross belt 53,which receives its power from a pulley on the main shaft, and thus drives the roll in the direction opposite to that of the revolution of the screen drum. The surface of this roll is preferably covered with some soft material, such as felt, rubber, etc. In operation, this oppositely-rotating roll scrapes the stock from the screen 111 surface. ,The stock, thus removed, is

pgulded, in its downward movement, by doctor 54, having its edge in contact with the surface of said roll.

Fig. 10 shows the roll in Fig. 9 replaced by a brush roll 55 which is adapted to be driven, by the means shown, in either -direction.

be employed, for the purposes of the invention, with substantiallythe same results as the corresponding roll and deflector in i 'and of the press roll 58. In operatiomthe couch roll diverts the thickened stock, in webform, fr the inner surface of the screen drum to-its own surface. The stock web on the surface of the couch roll is further pressed and strengthened by passing between the contacting surfaces of the couch and ress roll 57, the latter roll being constructs to pick up the stock, after this pressing action, and carry it on its own sur- Qface, whereon' it is again pressed at the oint of ,-'contact of the two press rolls, whence it 'falls by gravity onto shute 60. This shnlejs arranged at an angle to the axis of screen drum, and is inclined downwardly from the drive end toward the outletxrnd of the machine, providing a course along which the stock-web moves, by

gravity, out of thc' machine.

Fig: 12 shows a similar arrangement, an

additional pair of press rolls 61 and 62 bewhich after passing between the conprovided-to further dry out the stock W? jacting surfaces of said rolls, falls upon Said roll and deflector 56 maypcudcntaxes.

conveyor 63, by which it is carried to an desired point outside the machine.

The illustralions referred to herein show particular ap 'ilications of the'invention, but it should be understood that the main features thereof admit of employment in numerous diliercnt combinations. For instance, thescreen drum may be either horizontal, as shown, or vertical, andnylindrical,

polygonal or conical in form. Furthermore,

various means, in addition to those described, may be employed for diverting the thickened stock from the screening surl'acc, either'with or without disturbing the stockweb, and for further drying the said web and removing same from the machine all within the broad scope of the invention.

I claim:

1. In a machine or handling dilute paperpulp or other material suspended in liquid, the combination with a screen drum, ol means to rotate said drum rapidly to thickcn the stock contained therein by centrifugal force, and a roll adapted to operate in said drum.

2. In a machine for handling paperstock, the combination with a screen drum, of means to rotate said drum rapidlyto thicken the stock contained therein by centrifugal forcc, of a couch roll adapted to operate in said drum.

3. In a thickener ,i'or dilute paper-pulp or other material suspended in liquid, the (ombination with a screen drum, of means to, rotate said drum rapidly to' thicken the pulp contained therein by centrifugal force, and a roll adapted to operate in working proximity to the inner surface of said drum.

4. A thickening machine for dilutepaperpulp comprising in combination, a screen drum adapted to develop centrifugal force and a revolublc member therein, said drum and member being positioned to revolve around independent axes. t v

5. In a machine for handling relatively dilute paperstock or other material suspended in liquid, the combination with a screen drum adapted to develop centrifugal force, of rcvolublc means for removing the stock from the inner surfaceof said drum, said stock-removing means and said drum being positioned to revolve around indc-' (i. In a machine for handling relatively di ute papcrstock or other material suspended in liquid, the combination with a screen drum, of means to rotate said drum rapidly whercbv a substantial centrifugal efi'ectis exerted upon the stock contained therein, and means, driven by contact with the inner surface of said drum, to remove the thickened stock from said surface,

7. A paper-pulp handling machine comprising, in combination, a "screen drum, means to rotate said drum rapidlywhereby the pulp contained therein is centrifugal ly held upon lhc inner suit-ice of said drum to thicktn said pulp. of means to remove. the pulp from said surface. said pulp-removing means being adapted to revolve by reason of its contact with the surface of the screen drum. around an independent axis.

8. In a thickemng machine ior paper pulp, the combination with a screen drum,

' distribute the stock upon the inner surface ol said drum. and means to remove the thickened stock, in web form, from the said surface.

'11. A pa 'iermakiug machine, comprising,

in combination, a screening member, \vhereon a. pulp-web is adaptedto be formed by centrifugal force. and means to remove the said web intact from the said member.

12. A papermaking machine having a screen drum, means to form a pulp-web on the inner surface of said drum, and means to remove-said web, in undisintcgrated condition, from the said surface.

13. In a thickening machine for relatively dilute paperpulp or other material suspended in liquid, the combination with a screen drum, of means to deliver pulp upon the inner surface of said drum, along the entire length thereof, means to form a pulpweb upon the said surface, and means to re move the said web intact therefrom.

14. A thickening machine for relatively dilute paperpulp or other material suspended in liquid, comprising, in combination, a screen drum, a. pulp inlet longitudinally co-extensive with said drum, and one or more members adapted to remove the pulp from the inner surface of said drum.

15. A papermaking machine having, in combination, a screen drum, a stock inlet longitudinally co-extcnsivc with said drum, and. a roll adapted to operate within the screen drum.

16. A paper-making machine having, in combination. a screen drum, means to dis tribute the incoming stock upon the inner surface of the said drum, along a line parallel to the axis thereof, on which surface the stock is adapted to be thickened to a Eveb-forming consistency by centrifugal orce.

hination of a screen drum, with a pulp inlet to distribute the stock upon the innersu'rface of said drum, and means to divert the.

thickened stock from the said surface, said inlet and stock-diverting means being adapted to operate along parallel lines on the screening surface. f

18. A papermaking machine comprising, in combination, a screen drum, a stock inlet longitudinally coextensive with' said drum, and a roll adapted to remove thethickened stock, in web form, from the inner surface of the screen drum. i

19. In a papermaking machine, the combination of a screen drum, with means to supply stock to the inner surface of said drum along the entirelength thereof, upon which surface a stock-web is adapted to be formed by centrifugal force,'and means to divert the said web intact from the screen'- ing surface.

20. In a papermaking machine, the combination with a screen drum, of means to re Mite said drum rapidly to form a stock-web on the. inner surface thereof by centrifugal force, and a. roll to remove the stock-web in tact from the screening surface.

21. In a papermaking machine, the com bination with a screen drum, upon the inner surface of which drum the stock is adapted.

to be thickened by centrifugal force, and a trough to guide the thickened stock toward the outlet end ofthe machine...

22. In a papermaking machine,'the combination with a horizontal screen drum, of

a stock inlet longitudinally co-extensive with the said drum, a stationary stock guideway therein, and means revoluble in said guideway to move the thickened stock toward the outlet of the machine.

23. In a papermaking machine, the combination with a screen drum, of means to rapidly rotate said drum whereby the stock therein is thickened to a web-forming c0nsistency, and stationary means, also within the screen drum, to guide the stock to the outlet of the machine.

24. In a centrifugal papermaking machine, the combination with a screen drum, of a stock deflector therein axially parallel to the said drum and adapted to remove the stock from the inner surface thereof.

25. In a centrifugal papermaking machine, the combination with a screen drum, of a member to divert the thickened stock from the inner surface of said drum, said member being adjustable with respect to its proximity to the screening surface.

26. A centrifugal papermaking machinecomprising, in combination, a revoluble, screen drum, and a stock diverting member therein, said member being driven by contact with the surface of said drum.

27. A centrifugal papermaking machine comprising, in combination, a revoluble screen drum, and a stockdetlector therein, said deflector being driven by contact with the surface of said drum, and adjustable with respect to its proximity to said surface.

28. In a papermaking machine, the combination with a screen drum adapted to develop centrifugal force. of a roll provided to operate within the said drum and a member in tangential relation to said roll.

29. A papermaking machine comprising, in combination, a casing. a screen druin re'voluble therein. a roll proximate the innersurface of said drum and revoluble by contact therewith, an inlet to distribute stock upon the inner surface of the screen drum, a stock trough to guide the thickened stock toward the outlet end of the machine, and an outlet for the thickened stock.

30. A papermaking machine comprising, in combination, a screen drum adapted to develop centrifugal force, a stock reservoir therein, and a stock intake communicating with the said reservoir.

31. The process of handling paperstoek which consists in depositing the same upon the inner surface of a screen drum, rotating the same ra idly to form a stock-web, by centrifugal verting the said Web intact from the screening surface.

32. The process of handling relatively dilute paperstock or other material'suspended in liquid which consists in subjecting the stock to a preliminary agitation preparatory to its deposit on a screening surface, depositing said stock'upon said surface, simultaneously along the entire length thereof, forming a web thereon by centrifugal force, and removing the web intact from the said screening surface.

33. The process of handling relatively dilute paperstock or other material suspended in liquid in a screen drum which consists in' distributing the incoming stock upon the. inner surface of said drum along a line extending the entire length of said surface, and removing stock in Web form from-the screening surface, along a line thereon parallel to the line of distribution.

34. The process of thickening relatively dilute paperstock or other material suspended in liquid in a screen drum which consists in subjecting all the stock entering the said drum to centrifugal thickening action 'of predetermined duration.

35. The process of handling paperstock in a screen drum ,vvhich consists in subjecting orce, on said surface and di-' all the stock entering the said drum to a. centrifugal thickening action of predetermined duration, the duration of said thickening action in any given machine depending entirely upon the speed of revolution of thc'screen drum.

36.1n a machine for handling paperpulp or other material suspended in liquid. the combination with a screen drum. of means to rotate said drum rapidly to thicken the pulp deposited on the inner surface of said drum by centrifugal force, air or other fluid under pressure from the outside to lift the thickened pulp from the screening surface, and a cooperative member inside the screen druin to guide the diverted pulp toward the axis of the said drum..

37. As an article of manufacture, a paperpulp handling machine having a screen drum consisting of a plurality of rods parallel to the axis of said drum, a series of flat rings provided to encircle said rods said rods being mutually spaced apart and held in place by pipe braces titted over the said rods between the respective rings, nuts on the ends of said rods to stiffen the entire frainework-the whole being covered with suitable wire-screening.

38, A thickener for paperpulp having a horizontal drum and stationary means to remove the thickened stock from the inner surface of said drum.

39. A centrifugal thickener for paper-pulp having a horizontal drum and stationary means to remove the stock from the inner surface of said drum.

40. In a machine for handling relatively dilute paperp'ulp or other material suspended in liquid, the combination with a screen drum, of means to distribute pulp upon the inner surface of said drum, and a roll to remove the pulp, in Web Form, from said surface.

41. In a papermaking machine, the combination with a screen drum, of roll to divert the thickened stock from the inner surface of said drum, and a member provided to exert pressure upon said roll to' adjust the proximity thereof to the screening surface.

42. In a papcrmaking machine, the combination with ascrecn drum, of a roll to divert the thickened stocltfrom the inner surface of said drum, and a member provided to exert pressure upon saidroll, said member being adjustable to vary said pressure.

ANTON HAUG. 

